I have no idea what its called, maybe someone knows, but I remember a film with a very young Matt Leblanc, and he and his father get seperated from his two sisters in Alaska or somewhere and they have to shelter in a hut with hardly any food, meanwhile the sisters have to shelter under a boat. Eventually they get rescued, but not before Matt has to chop his fathers toes off because of frostbite, and you hear them go "clunk", into a basin. Nice.

The movie is Anything to Survive and was a 1990 "made for TV" production. Though I have not seen it, the movie is supposed to be based on actual events.